2. To my surprise, I must have the OB121 loaded to be able to change HWC online. I´m have deliberatly not used and pointer in my program (defensive programming) in order to minimise risks. Is there any way of summarize the possible senarios/effects you can get by having a OB121 in the CPU. I have experienced motors starting and stopping in a random way having OB121 loaded, but then we used both pointers and local data without hard structure.

Thank you.

Last edited by: O_Moderator at: 1/28/2011 2:12 PM

To my surprise, I must have the OB121 loaded to be able to change HWC online. I´m have deliberatly not used and pointer in my program (defensive programming) in order to minimise risks. Is there any way of summarize the possible senarios/effects you can get by having a OB121 in the CPU. I have experienced motors starting and stopping in a random way having OB121 loaded, but then we used both pointers and local data without hard structure.

About OB121, you can check section 1.27 of following manual.You can useOB121 with evaluation codes introduced in pages 83 and 84.